In each of the following situations, write the equation needed to calculate the yield to maturity You do not have to solve the equations for the interest rate i; just write the appropriate equations. a. A simple loan for $350,000 that requires a payment of $475,000 in five years. b. A discount bond with a current price of $720 that has a face value of $1,000 and matures in five years. c. A corporate bond with a face value of $1,000, a current price of $950, a coupon rate of 8%, and a maturity of six years. d. A student loan of $4,000 that requires payments of $275 per year for 20 years. The payments start in three years